calculate lingitude latitude distance

fuel-sliit-bakend-main/app/Http/Controllers/StationController.php

@@ -31,6 +31,16 @@ class StationController extends Controller
         }
         return response()->json(['respond'=>$respond,'count'=>$queue]);
     }
+    // calculate distance
+      public function calculateDistance($lat1, $lon1, $lat2, $lon2) {
+        $theta = $lon1 - $lon2;
+        $dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
+        $dist = acos($dist);
+        $dist = rad2deg($dist);
+        $miles = $dist * 60 * 1.1515;
+        $km = $miles * 1.609344;
+        return round($km,2);
+    }
 
     // This function for create a new Station with user
     public function create_station(Request $req){